Below are some sample maps and visualizations of the 1800 New York congressional elections for a presentation at the annual meeting of the Society for Historians of the Early American Republic, July 22, 2016.
Turnout was calculated as the ratio between the total number of votes cast and population of free white males over the age of sixteen.
Election records: Philip Lampi Collection of American Electoral Returns, 1788–1825, American Antiquarian Society (2007). And A New Nation Votes: American Election Returns, 1787–1825: http://elections.lib.tufts.edu/.
Population data: Minnesota Population Center, National Historical Geographic Information System, version 2.0, University of Minnesota (2011): https://nhgis.org/.
County boundary data: John H. Long, Peggy Tuck Sinko, et al. Atlas of Historic County Boundaries, Dr. William M. Scholl Center for American History and Culture, Newberry Library (2010): http://publications.newberry.org/ahcbp/project.html.
Congressional district boundary data: Jeffrey B. Lewis, Brandon DeVine, and Lincoln Pritcher with Kenneth C. Martis, “United States Congressional District Shapefiles,” University of California, Los Angeles (2013): http://cdmaps.polisci.ucla.edu/.